What happened to me? Got dizzy, hot, sweaty, lost eyesight and hearing got fuzzy?

I was at physicals put on by my school. I was in a tiny hallway packed with people and it was hot. All of the sudden I got REALLY hot and incredibly dizzy. I doubled over leaning against the wall with my hands of my knees to try to get feeling better. When I stood back up (still hot, sweaty and dizzy) I couldnt see anything besides black, so I bent back over. My eyesight came back a few seconds later but everything was shaking and foggy, my hearing became muffled. It slowly started getting better and when I went into the room where the physician checks your heart he asked me what was wrong. I was PALE! I was drenched in sweat and my paper was soggy from where I was holding it. My hands got tingly and joints got sore and my stomach hurt. I was reallly scared, and would like to know what happened to me. Im a 14 year old girl.. Please help!